Fire rating of galvanized sheet.

The fireproof grade and fireproof time of galvanized sheet mainly depend on its material and coating. ‌

The fire protection grade of galvanized sheet is usually divided into Grade A, B1, B2 and B3. Class A is incombustible, Class B1 is incombustible, Class B2 is combustible, and Class B3 is combustible. The fireproof grade of galvanized sheet has an important influence on its fireproof time and performance. Standard for fire protection grade of galvanized sheet The fire rating of galvanized sheet is classified according to its combustion performance.

Specifically:

Class A: Non-combustible material with the high fire resistance.

Class B1: flame retardant material with high fire resistance.

Class B2: combustible material with low fire resistance.

Class B3: flammable material with the lowe fire resistance.